This removes the deprecated options from 4.25. This includes the LDAP filters which allow {0} or {1} placeholders. The new aliases are documented. Additionally it refactors the keys validator to use uniform messages for most replaced keys.
* fix: redis sentinel secret missing
* refactor: use consts for authentication_backend.file.password errs
* fix: unit test for new default port
* test: cover additional misses
* test: fix windows/linux specific test error
* test: more windows specific tests
* test: remove superfluous url.IsAbs
* test: validator 100% coverage
* [FEATURE] Config Validation
* check configuration for invalid keys on startup
* allow users to manually trigger all configuration validation on a file using a cmd
* setup all defaults in config template and run tests against it to prevent accidents
* use tests to check bad configuration values are caught
* use tests to check old configuration values are caught
* add tests for specific key errors
* resolve merge conflicts
* nolint prealloc for test
James Elliott
Amir Zarrinkafsh